Feed and speed changing device.



No. 788,657. PATENTED MAY 2, 1905.

R. K. LB BLOND & W. F. GROENE. FEED AND SPEED CHANGING DEVICE.

APPLICATION FILED NOV. 28, 1904.

3 BHEETSSHEET 1.

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FEED AND SPEED CHANGING DEVICE.

APPLIOATION FILED NOV. 28, 1904.

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R. K. LE BLOND & W. P. GROENE.

' FEED AND SPEED CHANGING DEVICE.

APPLICATION FILED NOV.28,1904.

3 SHEETS-SHEBT 3,

llllllia k n vento rs MardK LeBZmJ William! Iiflivene witnesses UNITED STATES Patented May 2, 1905.

PATENT OFFICE.

RICHARD K. LE BLOND ANDWILLIAM F. GROENE, OF CINCINNATI, OHIO.

FEED AND SPEED CHANGING DEVICE.

SPECIFICATION forming part of Letters Patent No. 788,657, dated May 2, 1905.

Application filed November 28, 1904. Serial No. 234,530.

To all whom it may concern:

Be it known that we, RICHARD K. Ln BLOND and WILLIAM F. GROENE, citizens of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Feed and Speed Changing Devices, of which the following is a specification.

The invention to be hereinafter described relates to feed and speed changing devices adapted for a variety of uses where it becomes desirable at times to quickly change the relative movement of parts, and more especially the present invention relates to such devices applicable as a feed and speed changing means for machine-tools.

The objects of the invention, generally stated, are to provide a device of the above character by which a great variety of quick feed changes may be made in the simplest possible manner with the least possible friction and minimum number of parts, thus necessitating the least amount of care and assuring long life to the operating parts; to provide features of structure so that the acting machine elements may be rendered idle, if desired, while making the change of speeds; to provide means whereby the lead-screw of the machine may remain stationary during the operation of the feed-rod, and, further, objects which will appear hereinafter more fully.

With the above general objects in view the invention consists of the mechanical parts and combinations to be hereinafter more fully explained, and definitely pointed out in the claims.

In the drawings, which show the invention as embodied in a machine-tool, Figure 1 is an end view of a machine-tool having the present invention applied thereto. Fig. 2 is a side view of a head end of the machine-tool, some of the parts being broken away, showing the feed and speed changing device in its general arrangement adjacent thereto. Fig. 3 is a section on the line a; m of Fig. 1, showing some of the parts broken away to more clearly show the arrangement beyond. Fig. 4 is a transverse section of the feed-box and its contained parts on the line y y of Fig. 2; and Fig. 5 shows in detached detail the elongated gear, the stationary cylinder or casing surrounding the same, and the intermedlate gear with its carrying partsand ad uncts.

In the drawings, Fig. 2, A designates in general the head of an ordinary or any desirable form of machine-tool wherein the usual spindle A carries a series of pulleys of different sizes, A A A A A, as usual, and said spindle A carries the ordinary spindle-gear A the same being mounted in any suitable bearing on the head of the machine.

Disposed below the spindle A is the reverseplate B, having a sleeve journaled in the bearing A", as best shown in Fig. 3. The reverse-plate B carries a pair of gears B B, (see Fig. 1,) which by movement of the reverse-plate under the manipulation of a handle B may be caused to engage either one or the other with the spindle-gear A and when moved into their engaging position with the spindle-gear they may be locked 1n such position by means of a set-nut B to thereby change the direction of movement imparted to the train of gearing to be presently described.

J ournaled in the sleeve of the reverseplate is the stud C, having fastened thereto the gear C, which is in constant engagement with one of the reversing-gears B B, whereby movementimparted to the reversing-gears from the spindle-gear A is transmitted to the stud C. The inner end of the stud C, as shown in Fig. 3, has a sleeve or collar 0 secured thereto, and at a point beyond the gear C it has a second collar 0, said two collars thereby preventing endwise movement of the stud in its bearing.

Fixed to the stud Cm any suitable manner,

as by slot and key, is a pinion D, and also splined to the stud C (see Fig. 3) is the gear E, the said gear being movable lengthwise on the stud C while rotating therewith. As will be seen from Fig. 3, the hub e of the gear E is provided with a recess 6, and said recess is made of suitable size to enable it to receive therein the pinion D when the gearE is moved. to the right in Fig. 3. The hub of the gear E is extended somewhat, as seen in Fig. 3, and is provided with a circular groove -0 whereby the said gear, either by hand or by means of asuitable and usual operating device. may be moved longitudinally of the stud C, the end of the stud being provided with a suitable stop 6 secured by appropriate means to the end thereof to prevent accidental removal of the gear E while manipulating the same, as will be obvious.

From the construction thus far described it will be noted that the small pinion D and the gear E, which form telescoping gears, have rotation in unison with the stud O, and that said stud receives rotation in one or the other direction-by means of the reverse-gears B B according to which one of said gears is in operative engagement with the spindlegear, and that the gear E can be moved longitudinally of the stud to cover the pinion D, which at such time is received in the recess 6 of the said gear.

Passing now to consideration of the feedbox and its contained parts, as shown more fully in Figs. 2, 3, and 4 of the drawings, it is to be noted that the feed-box, identified as a whole by letter Z, is of an appropriate form and is secured to the frame of the machine by suitable screw-bolts or otherwise, as shown at z.

Mounted in suitable bearings f f, Fig. 3, is the cone-gear shaft F, carrying a series of gears F F of varying diameters, which, in effect, may constitute a cone of gears to which motion is to be imparted and from which rotative motion is to be derived. At the end of the series of the cone of gears is a supplemental gear G, for a purpose that will hereinafter appear.

Suitably mounted in the feed-box Z or in position adjacent to the cone of gears is a shaft H, which for identification may be termed the feed-box driving-shaft, and on this shaft is mounted the elongated gear H, which may be, in effect, as long as the cone of gears. Disposed about the elongated gear H is a stationary casing '01- cylinder h, which for identification may be termed the bearing-cylinder. The bearing-cylinder is concentric with and surrounds the elongated gear H, and the ends thereof may be formed with suitable journals for the feed-box drivingshaft. The details of structure are not essential in this respect, as will be understood, but may be varied within wide limits without departing from the spirit of the invention. The bearing-cylinder it in the part thereof adjacent the cone of gears, as seen in Fig. 4, is provided with a longitudinal slot it, for a purpose that will hereinafter appear.

Rotatively mounted upon the bearing-cylinder it is the bush K, which for identification may be termed the intermediate-gear carrier. This carrier, as will be readily seen from Figs. 4 and 5, while closely fitting about the bearing-cylinder and rotatable thereon, is also free to be moved longitudinally thereof by means of a handle it and locked in position lengthwise thereof to throw the intermediate gear K into engagement with any one of the gears of the cone of gears, and when in such engaged position the intermediate-gear carrier may be locked by the key 70 the slots it" being so disposed that the intermediate gear can be thrown into engagement with one of the gears of the cone of gears only when in proper position for such engagement, whereby engagement of the intermediate gear simultaneously with two gears of the cone may be prevented.

The feed-box driving-shaft H, as shown in Figs. 1 and 2, extends a short distance beyond the end of the feed-box Z and has mounted thereon to rotate therewith a boxgear L Swinging concentric with the box-gear L is the quadrant L, (best shown in Fig. 1,) said quadrant carrying the quadrant-gear L. The quadrant-gear, as will be understood from Fig. 1, remains in constant engagement with the box-gear L and may be made to operatively engage either the small pinion D or the gear E of the telescoping gears on the stud C by appropriately swinging the quadrant about the feed-box driving-shaft and moving the gear E into proper position. The quadrant L is slotted at Z and is provided at each end of the slot with suitable stop-screws Z which by adjustment in the slot the quadrantgear can be given the proper swinging movement to cause it to engage either of the gears D or E, and when in proper position the quadrant may be held there by hand-operated setnut Z From the construction thus far described it will be noted that the motion of the spindlegear A may be transmitted in desired directions through either the small gear D or the gear E of the telescoping gears to the quadrant-gear L and from there to the box-gear L on the feed-box driving-shaft. Motion is thus imparted to the elongated gear H, from which, through the intermediate gear K, such motion may be transmitted with varying degrees of speed to any of the gears of the cone of gears. It is obvious also that while certain details of structure have deen described these may be varied and modifications made therein within the scope of the present invention, the essential being that by a simple arrangement of telescoping gear connections between the usual spindle-gear and feed-box driving-shaft varyingmotions may be imparted to the. latter as to speed and from it transmitted with still varying speeds to the cone-gear shaft F and this Without removal of any of the gears of the system and while the machine is in operation.

Suitably mounted in the feed-box or adjacent to the cone-gear shaft F is a shaft M, which for identification may be designated the slip-gear shaft. This shaft is suitably extended through the ends of the feed-box, as shown in Figs. 2 and 3, and is connected to the feed-rod shaft M at m, a transmitting gear M being secured to the shaft, as shown in Figs. 2 and 3.

Extending in substantial parallelism with the feed-rod shaft M is the lead-screw N, which for a short distance has a smooth portion on which is slidably mounted a sliding gear N, the hub of which may be extended, as at a, so that said sliding gear may be moved lengthwise on the lead-screw into and out of engagement with the transmitting-gear M It will thus be seen that the feed-rod shaft and lead-screw may be connected or disconnected by a simple sliding movement of the sliding gear N on the lead-screw, so that when the lathe is used for turning the lead-screw may be made stationary.

Slidingly mounted on the slip-gear shaft M is a sleeve 0, carrying the two separated gears O O ,'Wl1lCl1 are of different diameters. The sleeve at one portion is provided with a circular groove 0, in which fits a pin or roller 0, carried by a hand-operated lever P, pivoted at p and extending through the Wall of the feedbox to be readily grasped by the hand of the operative. The gear of the sleeve is adapted to engage one of the gears of the cone of gears, as shown in Fig. 3, While the other gear, 0, is adapted to engage the supplemental gear G on the cone-gear shaft, thereby imparting to the slip-gear shaft a variety of speeds derived-from the cone-gear shaft, it being'understood, of course, that the sleeve 0 is splined to the slip-gear shaft, so that while rotatable therewith it is readily movable longitudinally thereon. r

Changes in details of the arrangement described may be made within the scope of the present invention, the essentials being simplicity of structure with wide range ofvarying speeds without removal or change of any of the parts of the structure, the Whole arrangement being compact and simple and, while incased and protected, is readily accessib e.

As will be noted from Fig. 4 and as already described the intermediate-gear carrier K is to be readily movable about as well as 1on gitudinally of the bearing-cylinder, and to facilitate this ease of movement, as well as to insure the locked position of the gear-carrier in case the locking-pin la should fail to hold the intermediate-gear carrier K issplit, as shown at 76 and the parts thereof clamped for imparting shaft.

together about the bearingcylinder It by means of a suitable hand-operated set-screw 71;, as will be obvious.

From the described mechanism it will be seen that with the gear-box itself eight changes of speed are possible by moving the intermedi ate-gear carrier into operative connection with the various gears of the cone and that these changes can then be doubled by the sleeve 0 on the slip-gear shaft, thus making sixteen changes in the box itself. These sixteen changes can then be doubled by the telescoping gears on the stud C, thus making thirtytwo changes, and when used for cutting screwthread will give a range of from three to fortysix per inch, thus covering standard gage of threads, and this entire range of speeds can be made without stopping the machine or removing any of the gears.

It willbe seen from the construction of the device as above set forth or modified as circumstances may dictate that the feed-box may be appropriately designated a primary speedchanging mechanism, with such of its contained parts as may be essential for giving change of speeds, and it will likewise be obvious that the gears D and E in their telescoping relation may be appropriately designated or identified as telescoping gears, and in the claims these terms will beused for designating these parts, except wherein the details of these parts are directly referred to.

Having thus described our invention, What we claim, and desire to secure by Letters .Patcut, is

1. In a feed and speed changing mechanism for machine-tools, the combination with a primary speed-changing mechanism comprising a cone-gear shaft and a cone of gears thereon, a driving-shaft, connections between the driving-shaft and cone of gears for driving the latter at varying speeds, of independentlymounted telescoping gears and devices disposed between said gears and the driving-shaft variable speeds to the driving- 2. In a feed and speed changing mechanism for machine-tools, the combination with a primary speed-changing mechanism comprising a cone-gear shaft and a cone of gears thereon, a driving-shaft,connections between the driving-shaft and the cone of gears for driving the latter at varying speeds, and a slip-gear shaft, means for transmitting the motion of the cone of gears to the slip-gear shaft, of telescoping gears for imparting variable speeds to the driving-shaft, and connections between saidlast-named gears and shaft.

3. In a feed and speed changing mechanism for machine-tools, the combination with a primary speed-changing mechanism comprising a cone-gear shaft, a driving-shaft, connections between the driving-shaft and the cone-gear shaft for driving the latter at varying speeds,

a slip-gear shaft, a pair of slip-gears carried by said shaft, connections between the cone gearshaft and the slip-gears of the slip-gear shaft for driving the latter atva r'ying speeds from the former, of telescoping gears for imparting variable speeds to the driving-shaft, and connections b'etw ee'nsaid las t-named gears and shaft.

4. In a feed and "speed c'hanging mechanisni for machine-tools, the-combination witha primary speed-changing mechanism, com prising a cone-gear shaft, a cone of gears and a supplemental gear thereon, a driving sha ft, connections between the d'riving shaft and the cone-gear shaft for driving the latter at varying speeds, a slip-gearshaft, asleeve s'plined to said shaft, and c'arrying gea'rs, one of which is adapted to engage a gear of the cone of gears, and the other adapted to engage the supplemental gear for driving the slip-gear shaft at varyingspeeds'of means for imparting various speeds to the driving-shaft.

5. In a feed and speed changingdevice for machine-tools,-the combination with a primary speed-changing mechanism, comprising an elongated gear, a cone-gear shaft, a cone of gears thereon, an intermediate gear for connecting the elongated gear with any of the gears of the cone of gears, a slip-gear shaft, variable-speed connections between the cone of gears and slip-gear shaft for imparting variable motion to the latter, withteles'coping gears for transmitting variable speeds to the elongated gear", and devices disposed between said gears and the elongated gear.

6. In afeed and speed changing mechanism for machine-tools, the combination of a conegear shaft, a series of gears of varying diameter constituting acone of gears onsaid shaft, an elongated driving-gear, a bearing-cylinder disposed about the elongated driving-gear, an intermediate -gea-r carrier movable axiai'ly about and longitudinaliyof the bearing-cylinder, an intermediate gear mounted on said carrier, and in constant engagement with the elongated driving-gear, a slip-gear shaft and variable-speed connections between the cone of gears and the slip-gear shaft for driving the latter at variable speeds from the former.

7 In a feed and speed changing mechanism for machine-tools, the combination of a conegear shaft, a cone'of gears thereon, an elongated drivinggear, a bearing-cylinder disposed about the elongated driving-gear, an intermediate gear carrier movable axially about and longitudinally of the bearing-cyiinder, an intermediate gear mounted on said carrier and in constant engagement with the elongated driving-gear, and telescoping gears and connections between them and the elongated driving-shaft for driving theelon'gateddriving-gear at varying speeds.

8. In a feed and speed changing mechanism for machine -tools, the combination with a primary speed-changing mechanism, comprising a cone-gear shaft, anda cone of gears thereon, a driving shaft, and intermediate connections between said driving-shaft and the cone cf gears for driving the cone=gear shaft at varying speeds, a slip-gear shaft and means for driving it at varying speeds from the cone of gears, with telescoping gears of different diameters and means for connecting either one of said gears to the driving-shaft.

9. In a feed and speed changing device for machine-tools, the combination of a primary speed changing mechanism, comprising "a driving=sha ft and "a slip-gear shaft, connections between said shafts for driving the slip-gear s'ha'ft at varying speeds from the driving-shaft, a quadrant-gear, telescoping gears adapted for selective engagement with the quadrant gear, means forte'lescoping one of said gears over the other, and connections between the quadrant-gear and "the drivings'haft.

10. In a feedand speed-changing mechanism for machine-tools, the combination of aslipgear shaft, and means for driving it at varying speeds, a feed-rod shaft connected to the slip-gear shaft, a lead-screw shaft, a sliding gear on said lead-screw, and affixed gear carried by the slip-gear shaft with which said sliding gear is adapted to be 'de'tachably'engag-ed.

11. Ina feed and 'speed'changing device for machine-tools, the combination of a slip-gear shaft, mea-nsfor driving said shaft at varying speeds, a feed-rod shaftconnec'te'd to said gearshaft, a lead-screw shaft, a gear fixed to the slip-gear shaft, a sliding gear s-plined to the lead-screw shaft, and means whereby the slidinggear "may be moved into and out of engagement with the said fixed gear.

1'2. Ina feed and speed changing device for mach ine-too'ls,th"e combination-of astud-sh aft, means for driving said shaft in differentdirecti'ons, a gear fixed to said sfha ft, a telescoping gear rotatable with and movable longitudinally on said s'tuchshaft, said last-named gear having a recess to receive the fixed gear when moved into operative position, a primary speed-changing mechanism and means for connecting either the fixed or telescoping gear with the primary speed-cha'ngingmechanism.

13. In a feed and speed changing mechanism for machine-tools, the combination of a studshaft, means for driving said shaft in different directions, agear fixed to said shaft, a "telescoping gear rotatable with and movable longitudina-lly on said shaft, means for telescoping the last-named gear over the fixed gear, a primary speed *c'hanging mechanism and means for connecting either the fixedgor telescoping gear with said primary speed-changi'ng mechanism, said mechanism comprising a driving-shaft, a slip-gear shaft, and variablespeed devices between said shafts.

14. Inafeed and speed changing mechanism and provided with a clamp to secure it in pofor machine-tools, the combination of a series sition. of gears of varying diameters, an elongated In testimony whereof weafiix our signatures driving gear, a bearing cylinder disposed in presence of two Witnesses. 5 about the elongated driving-gear, an inter- RIOHD K LE BLOND mediate-gear carrier movable axially about and longitudinally of the bearing-cylinder, an WILLIAM GROENE' intermediate gear mounted on said carrier, Witnesses: and in constant engagement with the elongated FRED. LE BLOND, I driv1ng-gear,sa1dbearing-cyhnderbemgspl1t GEO. T. PRITOHARD. 

